Question 1

True or false: Objects at Lagrange points are completely stationary relative to the two larger bodies.

Accepted Answer

False. They orbit the point in a halo or Lissajous trajectory; only the point itself is stationary in the rotating frame.

Question 2

True or false: There are exactly five Lagrange points in any two-body gravitational system.

Accepted Answer

True. L1 through L5 are the only equilibrium solutions in the circular restricted three-body problem.

Question 3

True or false: The James Webb Space Telescope orbits the Sun-Earth L2 point, not Earth itself.

Accepted Answer

True. Webb orbits L2, 1.5 million km from Earth, staying aligned with the Sun and Earth for thermal stability.

Question 4

True or false: Only spacecraft can occupy Lagrange points—natural objects like asteroids never do.

Accepted Answer

False. Trojan asteroids share Jupiter's L4 and L5 points, and Earth has a small companion at L4 called 2010 TK7.

Question 5

True or false: Lagrange points exist only in systems with two massive bodies, like a planet and its moon.

Accepted Answer

True. Lagrange points are defined in the circular restricted three-body problem, requiring two large bodies and one negligible mass.

Question 6

True or false: L4 and L5 are the only stable Lagrange points, able to hold objects for millions of years.

Accepted Answer

True. L1, L2, and L3 are metastable; only L4 and L5 have gravitational wells that resist perturbations.

Question 7

True or false: A satellite at the Earth-Moon L1 point would always be in Earth's shadow and never see sunlight.

Accepted Answer

False. L1 is between Earth and Moon but not in permanent shadow; its orbit can be designed to avoid eclipses.

Question 8

True or false: The L3 Lagrange point is always hidden behind the Sun, making it impossible to communicate with.

Accepted Answer

False. L3 is behind the Sun from Earth's view, but communication is possible via relay satellites or when Earth moves.

Lagrange Points Trivia Questions